This program has been conducted quarterly from July 1998 through the
present. All sampling is conducted using Seabird CTDs at fixed stations and
using similar methods. In most cases, the entire grid is sampled in a three to
four day period.

Data from the monitoring stations maintained by City of San Diego for the Point
Loma Ocean Outfall permit and the International Boundary Water Commission's
(IBWC) South Bay Ocean Outfall are integrated to allow access to the
hydrography data gathered by the major EPA NPDES permit holders in Southern
California.